Kaltura_Client_Exception thrown

Invalid KS "ZDk1Y2I4Y2Q2Mzk3ZjFjYTcyNmMwYzFkMzk5OWU2NWVhNjQ3NDhkZHwxMDE7OzE0NzUxNTc3Njg7MjsxNDc1MDcxMzY4LjgzNDQ7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"